https://github.com/busterc/assert-dotenv
:warning: One fell swoop for loading and asserting environment settings in node.
https://github.com/busterc/assert-dotenv
conf config dotenv env environment environment-variables environment-vars environments
Last synced: about 1 year ago
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:warning: One fell swoop for loading and asserting environment settings in node.
- Host: GitHub
- URL: https://github.com/busterc/assert-dotenv
- Owner: busterc
- Created: 2014-10-22T21:25:13.000Z (over 11 years ago)
- Default Branch: master
- Last Pushed: 2015-08-13T20:06:42.000Z (over 10 years ago)
- Last Synced: 2025-04-23T16:24:04.484Z (about 1 year ago)
- Topics: conf, config, dotenv, env, environment, environment-variables, environment-vars, environments
- Language: JavaScript
- Homepage:
- Size: 116 KB
- Stars: 15
- Watchers: 3
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# assert-dotenv
**assert-dotenv = [dotenv](https://github.com/motdotla/dotenv) + [dotenv-assert](https://github.com/busterc/dotenv-assert)**
One fell swoop for loading and asserting environment settings in node.
## Version 3.0.0
- This module now fully supports sync and async execution
- Synchronous execution throws errors (when errors)
- Asnychronous execution passes errors to the error-first callback
## Why use assert-dotenv
- Storing [configuration in the environment](http://www.12factor.net/config) is one of the tenets of a [twelve-factor app](http://www.12factor.net/).
- Implicit default settings can lead to confusing troubleshooting scenarios and should be avoided entirely.
- The `assert.env` file only lists what environment settings (keys) are required without providing values like private tokens, passwords, etc. and therefore can and should be checked into version control repositories.
- `.env` files contain setting keys and values, therefore, they should not be checked into version control repositories.
## How does it work
An exception is thrown if any of these cases are true:
- An `assert.env` (or otherwise specified) file is not found
- The keys listed in the `assert.env` file are not set on the `process.env` node object
Otherwise, your environment settings are applied and your application executes as expected.
## Installation
```sh
$ npm install --save assert-dotenv
```
## Usage
```javascript
/**
* Synchronously load .env and assert.env files from CWD or
* from the nearest parent directory where they are found.
*/
require('assert-dotenv')();
/**
* or, specify custom file locations and/or file names
*
* CAVEAT: specifying a filename (without a path) will cause
* the file to be loaded from CWD or the nearest parent
* directory where it is found.
*/
require('assert-dotenv')({
dotenvFile: '../configs/.env.staging',
assertFile: 'assert.env.staging'
});
/**
* Asynchronous execution occurs when you provide a callback
*/
require('assert-dotenv')(function(error){
if(error) throw error;
console.log('Environment Settings Loaded and Asserted!');
});
/**
* also, you can async with options
*/
require('assert-dotenv')({
dotenvFile: 'dev.env',
assertFile: 'assert.dev.env'
}, function(error){
if(error) throw error;
console.log('Environment Settings Loaded and Asserted!');
});
```
## Simple HTTP Server Example
- ~/app/.env
```
IP=127.0.0.1
PORT=1337
```
- ~/app/assert.env
```
IP
PORT
```
- ~/app/index.js
- Synchronous Example
```javascript
require('assert-dotenv')();
var http = require('http');
http.createServer(function(request, response) {
response.writeHead(200, {'Content-Type': 'text/plain'});
response.end('Hello World\n');
}).listen(process.env.PORT, process.env.IP);
console.log('==> Server running at http://' + process.env.IP + ':' + process.env.PORT + '/');
```
- Asynchronous Example
```javascript
require('assert-dotenv')(function(error) {
if(error) throw error;
var http = require('http');
http.createServer(function (request, response) {
response.writeHead(200, {'Content-Type': 'text/plain'});
response.end('Hello World\n');
}).listen(process.env.PORT, process.env.IP);
console.log('==> Server running at http://' + process.env.IP + ':' + process.env.PORT + '/');
});
```
- _Start the server and see that all is well_
```sh
$ node ~/app/index.js
==> Server running at http://127.0.0.1:1337/
```
## LICENSE
ISC License (ISC)
Copyright © 2014-2015, Buster Collings
Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.